!i (or ‘Not I’) is a clever artillery-style shooter for one or two players. The world is divided up into black and white, and each player takes it in turns to fire off a block of their own colour, and eradicate the enemy from beneath.
The two teams exist on opposite sides of the world, and the screen can be flipped to allow either player to be on top. A single player can battle against a AI-controlled army (although the computer is far too good) or two players can go head-to-head. What is really rather awesome is that all the text around the screen reads the same way when turned upside down. You can even flip the title screen!
Give it a PC, Mac or Linux download at GooeyBlob.